Motor-mounting for electric cars



No. 6|l,46l. Patented Sept. 2 7, "39%.

S. H." SHORT.

MOTOR MOUNTING FOB ELECTRIC CARS.

(Application fil d June 26, 1897.) (No Model.)

AIEN'I much.

SIDNEY H. sHoRT, OFCLEVELAND, ouIo.

MOTOR-MOUNTING FOR ELECTRIC CARS.

SPECIFICATION forming part of Letters Patent No. 611,461, dated September 27, 1898. Applitation filed June 26, 1897. RenewedMay 19, 1898. Serial No. 681,175. (No model.)

To aZZ whom it may concern:

Be it known that I, SIDNEY H. SHORT, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a new and useful Motor- Mounting for Electric Cars, of which the following is a specification.

This invention relatesto motor mountings for electric cars.

The object of the invention is to provide a motor-mounting for electric cars of simple construction wherein the motor-armature and the truck-axle are brought into closer relation, whereby the same degree of speed reduction between the shaft and axle as heretofore may be secured with smaller-sized reduction-gears, thereby economizin g space and permitting the employment of larger sizes of motors.

' The invention consists, substantially,in the construction, combination, location, and relative arrangement, all as will be more fully hereinafter set forth, as shown in the accompanying drawings, and finally specifically pointed out in the appended claims.

Referring to the accompanying drawings and to the various views and reference signs appearing thereon, Figure 1 is a view in end elevation of a motor in its operative relation to a car-axle in accordance with my invention, the motor-shaft and the car-axle being in transverse section. Fig. 2 is a plan view of the same. Fig. 3 is a view in front elevation of the same. Fig.4c is a View similar. to Fig. 1, indicating in dotted lines the principle of the present improvement over the prior art.

The same part is designated by the same reference sign wherever it occurs throughout the several views. V

In the equipment of modern electric cars it is a matter of material importance to provide motors of as large a capacity as possible, so that the motor may be enabled to develop sufficient power to meet all the exigencies of a varying traffic. It is also necessary to employ suitable reductiongears between the motor shaft and the driven axle. In the prior art any increase in the size of the motor neccessarily resulted in an increase in the diameters of the reduction-gearing in order for the gear on the axle to reach and to intermesh with the gear on the motor shaft, and since the gear on the axle cannot exceed in diameterthe size of the car-wheel it will be readily seen that the size of the motor, and hence the capacity thereof; is necessarily prescribed. To obviate thisdifficulty and to bring the axle into closer proximity to the motor-shaft is the purpose of the present invention.

Referring to the accompanying drawings, reference sign A designates the motor-shaft;

B, the axle; O, the motor-armature; D, the

car-wheel E, the field mag'nets F, means for supporting the field-magnets frame from the car-body or truck-frame; G H, the reductiongears, respectively mounted on the motorshaft and the car or truck'axle. The motor employed is of the multipolar type, employ ing four or more wound magnetic poles supported radially within the field-magnet-supporting ring or frame, and in carrying out the purpose of my invention and in order to secure the desirable ends had in viewI so relatively arrange the field-magnet frame that the car or truck axle B passes within the magnetic ring of the motor-field. This idea may be carried into practical effect in several ways.

For instance and as shown in Fig. 1, the field- "seen that I provide a construction and arrangement wherein is employed a multipolar motor wherein the poles project radially within the supporting-rin g thereof and receive therein the field windings or-coils, the motorarmature being arranged to revolve in the space surrounded by said multiple polar projections, and hence the lateral distance between the motor-shaft and thecar or truck axle is very much shortened, thus permitting the size of the motor, and hence its capacity,to be increased withoutincreasing the size of-the reduction gears. Moreover, by the construction described I am enabled to tilt the motor to a point above the axle, as indicated in Figs. 1 and 3. This is a material feature, for any increase in the size of the motor when the motor-shaft and thecar-truck axle are in the same horizontal plane causes the outer periphery of the motor to approach objectionally near the surface of the road-bed; but by the present construction I am enabled to tilt the motor and without increasing the diameter of the reduction-gears, thereby providing a decated at P, Fig. 3, adjacent to and parallel with the track-rails. These guard-rails are located in the vertical plane of the reductiongears G H, and therefore still further prescribe and limit the diameters of said gears. Again, in elevated-railway equipments the importance of employing as large motors as possible is increased by reason of the fact that in the economical operation of such roads it is desirable, during certain hours of the day, to employ several cars as trailers, and hence at those hours the motors on the motor-car are called upon to develop a much larger power than at other hours of the day, when the traffic falls off, and when it isnot economical or desirable to run the maximum number of cars in the train. By the foregoing construction I am enabled to provide a larger-sized motor than would be possible otherwise.

Having now set forth the object and nature of my invention and the manner of carrying the same into practical effect, what I claim as new and useful and of my own invention, and desire to secure by Letters Patent of the United States, is

1. In a motor-mounting for electric cars, the combination with a multipolar motor and an axle, and gearing connecting the same, said axle arranged to pass within the magnetic ring of the motor-field, as and for the purpose set forth.

2. The combination with a motor armature and shaft, a supporting-frame for multiple magnetic poles of the motor-field, said frame having bearings formed within the magnetic ring of such field, an axle arranged to be received in said bearings, and intermeshing gears mounted respectively on said shaft and axle, as and for the purpose set forth.

3. The combination witha motor armature and shaft,a sectional supporting-frame for the motor-field, bearings formed in the sections of said frame within the periphery thereof, an axle arranged to be received in said bearings and gearing connecting said shaft and axle, as and for the purpose set forth.

4:. In a motor-mounting for electric cars, the

combination of a multipolar motor and an axle, arranged to pass within the magnetic ring of the field of such motor the shaft of said motor being arranged in a higher plane than said axle, and intermeshing gears respctively mounted on said motor shaft and axle, as and for the purpose set forth.

In witness whereof I have hereunto set my hand, this 23d day of June, 1897, in the presence of the subscribing witnesses.

SIDNEY H. SHORT.

Attest:

M. A. KENSINGER, JOHN J. BEVER. 

